Vocabulary

1. when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction
5. one force is greater than another, the forces are not balanced
6. The rate of change of velocity per unit of time.
8. the quantity of matter that a body contains, as measured by its acceleration under a given force or by the force exerted on it by a gravitational field.
10. Force Equal in size and opposite in direction
12. the resistance that one surface or object encounters when moving over another.
15. the moving of something from its place or position
16. the rate and direction of an object's movement.
17. a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force

2. an amount of space between two things or people.
3. a tendency to do nothing or to remain unchanged.
4. the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it.
7. strength or energy as an attribute of physical action or movement.
9. not moving or not intended to be moved.
11. the force that attracts a body toward the center of the earth, or toward any other physical body having mass.
13. the time rate at which an object is moving along a path
14. cease work or movement in order to relax, refresh oneself or recover strength.